LOCTITE® 403 Instant Adhesive

Known as Loctite 403 Prism Instant Adhesive

Features and Benefits

LOCTITE 403 Instant Adhesive is a low odor, low bloom alkoxyethyl-based instant adhesive that is ideal for absorbent surfaces and in applications where vapor control is difficult.
LOCTITE® 403 Instant Adhesive is a medium viscosity product with low odor and low blooming properties that is transparent and colorless when cured. LOCTITE 403 provides for rapid bonding to metals, plastics, and elastomers, as well as to porous and absorbent materials such as wood, paper, leather, and fabrics.
  • Low odor for applications where vapor control is vital
  • Transparent and colorless
  • Low bloom for cosmetic applications
  • Well suited to porous substrates
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Technical Information

Application method, Recommended Dispense System, Manual
Applications, Recommended Bonding Close Fitting Parts
Color Ultra Clear
Fixture time, Steel 30.0 sec.
Gap fill 0.2 mm
Key characteristics, Recommended Bloom: Low Bloom, Gap Filling, Odor: Low Odor, Surface Insensitive, Viscosity: Medium Viscosity
Operating temperature -40.0 - 80.0 °C (-40.0 - 175.0 °F )
Shear strength, Mild Steel (grit blasted) 20.3 N/mm² (2950.0 psi )
Viscosity 1200.0 mPa·s (cP)

How to

Step by Step Guide

1. Preparation - Cleaning

It is recommended to use the correct LOCTITE® cleaner for the surface to be bonded (such as LOCTITE® SF 7070™) to degrease and clean surfaces prior to applying the adhesive.

2. Preparation - Priming

To improve adhesion on difficult to bond plastic surfaces, apply LOCTITE® SF 770™ to the bond area by brushing or dipping. Avoid applying excess primer. Allow the primer to dry.

3. Preparation - Activation

If cure speed is too slow, use appropriate activator LOCTITE® SF 7452™. Apply activator to one bond surface by spray, brush or dipping (not primed surfaces). Allow the activator to dry.

4. Application

Apply adhesive to one side or part.Recommended dispensing equipment: for precise dispensing of small amounts of adhesive, use dispensing needles.

5. Assembly

Assemble parts immediately. The parts should be accurately located as the short fixture time leaves little opportunity for adjustment. Bond should be held or clamped until the adhesive has fixtured. Hint: if necessary, excess product can be cured by activator LOCTITE® SF 7452™. Spray or drop activator onto excess product.

Frequently Asked Questions